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/**
* Copyright 2005-2007 ECMWF
*
* Licensed under the GNU Lesser General Public License which
* incorporates the terms and conditions of version 3 of the GNU
* General Public License.
* See LICENSE and gpl-3.0.txt for details.
*/
#include "grib_api_internal.h"
#include <math.h>
/*
This is used by make_class.pl
START_CLASS_DEF
CLASS = accessor
SUPER = grib_accessor_class_data_simple_packing
IMPLEMENTS = unpack_double
IMPLEMENTS = value_count
IMPLEMENTS = init
MEMBERS= const char* GRIBEX_sh_bug_present
MEMBERS= const char* ieee_floats
MEMBERS= const char* laplacianOperatorIsSet
MEMBERS= const char* laplacianOperator
MEMBERS= const char* sub_j
MEMBERS= const char* sub_k
MEMBERS= const char* sub_m
MEMBERS= const char* pen_j
MEMBERS= const char* pen_k
MEMBERS= const char* pen_m
END_CLASS_DEF
*/
/* START_CLASS_IMP */
/*
Don't edit anything between START_CLASS_IMP and END_CLASS_IMP
Instead edit values between START_CLASS_DEF and END_CLASS_DEF
or edit "accessor.class" and rerun ./make_class.pl
*/
static int unpack_double(grib_accessor*, double* val,size_t *len);
static long value_count(grib_accessor*);
static void init(grib_accessor*,const long, grib_arguments* );
static void init_class(grib_accessor_class*);
typedef struct grib_accessor_data_sh_packed {
grib_accessor att;
/* Members defined in gen */
/* Members defined in values */
int carg;
const char* seclen;
const char* offsetdata;
const char* offsetsection;
int dirty;
/* Members defined in data_simple_packing */
const char* units_factor;
const char* units_bias;
const char* changing_precision;
const char* number_of_values;
const char* bits_per_value;
const char* reference_value;
const char* binary_scale_factor;
const char* decimal_scale_factor;
/* Members defined in data_sh_packed */
const char* GRIBEX_sh_bug_present;
const char* ieee_floats;
const char* laplacianOperatorIsSet;
const char* laplacianOperator;
const char* sub_j;
const char* sub_k;
const char* sub_m;
const char* pen_j;
const char* pen_k;
const char* pen_m;
} grib_accessor_data_sh_packed;
extern grib_accessor_class* grib_accessor_class_data_simple_packing;
static grib_accessor_class _grib_accessor_class_data_sh_packed = {
&grib_accessor_class_data_simple_packing, /* super */
"data_sh_packed", /* name */
sizeof(grib_accessor_data_sh_packed), /* size */
0, /* inited */
&init_class, /* init_class */
&init, /* init */
0, /* post_init */
0, /* free mem */
0, /* describes himself */
0, /* get length of section */
&value_count, /* get number of values */
0, /* get number of bytes */
0, /* get offset to bytes */
0, /* get native type */
0, /* get sub_section */
0, /* grib_pack procedures long */
0, /* grib_pack procedures long */
0, /* grib_pack procedures long */
0, /* grib_unpack procedures long */
0, /* grib_pack procedures double */
&unpack_double, /* grib_unpack procedures double */
0, /* grib_pack procedures string */
0, /* grib_unpack procedures string */
0, /* grib_pack procedures bytes */
0, /* grib_unpack procedures bytes */
0, /* pack_expression */
0, /* notify_change */
0, /* update_size */
0, /* preferred_size */
0, /* resize */
0, /* nearest_smaller_value */
0, /* next accessor */
0, /* compare vs. another accessor */
0, /* unpack only ith value */
0, /* clear */
};
grib_accessor_class* grib_accessor_class_data_sh_packed = &_grib_accessor_class_data_sh_packed;
static void init_class(grib_accessor_class* c)
{
c->dump = (*(c->super))->dump;
c->next_offset = (*(c->super))->next_offset;
c->byte_count = (*(c->super))->byte_count;
c->byte_offset = (*(c->super))->byte_offset;
c->get_native_type = (*(c->super))->get_native_type;
c->sub_section = (*(c->super))->sub_section;
c->pack_missing = (*(c->super))->pack_missing;
c->is_missing = (*(c->super))->is_missing;
c->pack_long = (*(c->super))->pack_long;
c->unpack_long = (*(c->super))->unpack_long;
c->pack_double = (*(c->super))->pack_double;
c->pack_string = (*(c->super))->pack_string;
c->unpack_string = (*(c->super))->unpack_string;
c->pack_bytes = (*(c->super))->pack_bytes;
c->unpack_bytes = (*(c->super))->unpack_bytes;
c->pack_expression = (*(c->super))->pack_expression;
c->notify_change = (*(c->super))->notify_change;
c->update_size = (*(c->super))->update_size;
c->preferred_size = (*(c->super))->preferred_size;
c->resize = (*(c->super))->resize;
c->nearest_smaller_value = (*(c->super))->nearest_smaller_value;
c->next = (*(c->super))->next;
c->compare = (*(c->super))->compare;
c->unpack_double_element = (*(c->super))->unpack_double_element;
c->clear = (*(c->super))->clear;
}
/* END_CLASS_IMP */
typedef unsigned long (*encode_float_proc)(double);
typedef double (*decode_float_proc)(unsigned long);
static void init(grib_accessor* a,const long v, grib_arguments* args)
{
grib_accessor_data_sh_packed *self =(grib_accessor_data_sh_packed*)a;
self->GRIBEX_sh_bug_present = grib_arguments_get_name(a->parent->h,args,self->carg++);
self->ieee_floats = grib_arguments_get_name(a->parent->h,args,self->carg++);
self->laplacianOperatorIsSet = grib_arguments_get_name(a->parent->h,args,self->carg++);
self->laplacianOperator = grib_arguments_get_name(a->parent->h,args,self->carg++);
self->sub_j = grib_arguments_get_name(a->parent->h,args,self->carg++);
self->sub_k = grib_arguments_get_name(a->parent->h,args,self->carg++);
self->sub_m = grib_arguments_get_name(a->parent->h,args,self->carg++);
self->pen_j = grib_arguments_get_name(a->parent->h,args,self->carg++);
self->pen_k = grib_arguments_get_name(a->parent->h,args,self->carg++);
self->pen_m = grib_arguments_get_name(a->parent->h,args,self->carg++);
a->flags |= GRIB_ACCESSOR_FLAG_DATA;
a->length=0;
}
static long value_count(grib_accessor* a)
{
grib_accessor_data_sh_packed *self =(grib_accessor_data_sh_packed*)a;
int ret = 0;
long sub_j= 0;
long sub_k= 0;
long sub_m= 0;
long pen_j= 0;
long pen_k= 0;
long pen_m= 0;
if((ret = grib_get_long_internal(a->parent->h,self->sub_j,&sub_j)) != GRIB_SUCCESS)
return ret;
if((ret = grib_get_long_internal(a->parent->h,self->sub_k,&sub_k)) != GRIB_SUCCESS)
return ret;
if((ret = grib_get_long_internal(a->parent->h,self->sub_m,&sub_m)) != GRIB_SUCCESS)
return ret;
if((ret = grib_get_long_internal(a->parent->h,self->pen_j,&pen_j)) != GRIB_SUCCESS)
return ret;
if((ret = grib_get_long_internal(a->parent->h,self->pen_k,&pen_k)) != GRIB_SUCCESS)
return ret;
if((ret = grib_get_long_internal(a->parent->h,self->pen_m,&pen_m)) != GRIB_SUCCESS)
return ret;
if (pen_j != pen_k || pen_j!=pen_m ) {
grib_context_log(a->parent->h->context,GRIB_LOG_ERROR,"pen_j=%ld, pen_k=%ld, pen_m=%ld\n",pen_j,pen_k,pen_m);
Assert ((pen_j == pen_k) && (pen_j == pen_m));
}
return (pen_j+1)*(pen_j+2)-(sub_j+1)*(sub_j+2);
}
static int unpack_double(grib_accessor* a, double* val, size_t *len)
{
grib_accessor_data_sh_packed* self = (grib_accessor_data_sh_packed*)a;
size_t i = 0;
int ret = GRIB_SUCCESS;
long hcount = 0;
long lcount = 0;
long hpos = 0;
long lup = 0;
long mmax = 0;
long n_vals = 0;
double *scals = NULL;
double *pscals=NULL;
double dummy=0;
double s = 0;
double d = 0;
double laplacianOperator = 0;
unsigned char* buf = NULL;
unsigned char* hres = NULL;
unsigned char* lres = NULL;
unsigned long packed_offset;
long lpos = 0;
long maxv = 0;
long GRIBEX_sh_bug_present =0;
long ieee_floats = 0;
long offsetdata = 0;
long bits_per_value = 0;
double reference_value = 0;
long binary_scale_factor = 0;
long decimal_scale_factor = 0;
long sub_j= 0;
long sub_k= 0;
long sub_m= 0;
long pen_j= 0;
long pen_k= 0;
long pen_m= 0;
double operat= 0;
decode_float_proc decode_float = NULL;
n_vals = grib_value_count(a);
if(*len < n_vals){
*len = n_vals;
return GRIB_ARRAY_TOO_SMALL;
}
if((ret = grib_get_long_internal(a->parent->h,self->offsetdata,&offsetdata))
!= GRIB_SUCCESS) return ret;
if((ret = grib_get_long_internal(a->parent->h,self->bits_per_value,&bits_per_value))
!= GRIB_SUCCESS) return ret;
if((ret = grib_get_double_internal(a->parent->h,self->reference_value,&reference_value))
!= GRIB_SUCCESS) return ret;
if((ret = grib_get_long_internal(a->parent->h,self->binary_scale_factor,&binary_scale_factor))
!= GRIB_SUCCESS) return ret;
if((ret = grib_get_long_internal(a->parent->h,self->decimal_scale_factor,&decimal_scale_factor))
!= GRIB_SUCCESS)
return ret;
if((ret = grib_get_long_internal(a->parent->h,self->GRIBEX_sh_bug_present,&GRIBEX_sh_bug_present))
!= GRIB_SUCCESS)
return ret;
if((ret = grib_get_long_internal(a->parent->h,self->ieee_floats,&ieee_floats)) != GRIB_SUCCESS)
return ret;
if((ret = grib_get_double_internal(a->parent->h,self->laplacianOperator,&laplacianOperator))
!= GRIB_SUCCESS)
return ret;
if((ret = grib_get_long_internal(a->parent->h,self->sub_j,&sub_j)) != GRIB_SUCCESS)
return ret;
if((ret = grib_get_long_internal(a->parent->h,self->sub_k,&sub_k)) != GRIB_SUCCESS)
return ret;
if((ret = grib_get_long_internal(a->parent->h,self->sub_m,&sub_m)) != GRIB_SUCCESS)
return ret;
if((ret = grib_get_long_internal(a->parent->h,self->pen_j,&pen_j)) != GRIB_SUCCESS)
return ret;
if((ret = grib_get_long_internal(a->parent->h,self->pen_k,&pen_k)) != GRIB_SUCCESS)
return ret;
if((ret = grib_get_long_internal(a->parent->h,self->pen_m,&pen_m)) != GRIB_SUCCESS)
return ret;
self->dirty=0;
switch (ieee_floats) {
case 0:
decode_float=grib_long_to_ibm;
break;
case 1:
decode_float=grib_long_to_ieee;
break;
case 2:
decode_float=grib_long_to_ieee64;
break;
default:
return GRIB_NOT_IMPLEMENTED;
}
Assert (sub_j == sub_k);
Assert (sub_j == sub_m);
Assert (pen_j == pen_k);
Assert (pen_j == pen_m);
buf = (unsigned char*)a->parent->h->buffer->data;
maxv = pen_j+1;
buf += offsetdata;
hres = buf;
lres = buf;
packed_offset = offsetdata + 4*(sub_k+1)*(sub_k+2);
lpos = 8*(packed_offset-offsetdata);
s = grib_power(binary_scale_factor,2);
d = grib_power(-decimal_scale_factor,10) ;
scals = (double*)grib_context_malloc(a->parent->h->context,maxv*sizeof(double));
Assert(scals);
scals[0] = 0;
for(i=1;i<maxv;i++){
operat = pow(i*(i+1),laplacianOperator);
if(operat != 0)
scals[i] = (1.0/operat);
else{
scals[i] = 0;
}
}
i=0;
while(maxv>0)
{
lup=mmax;
if(sub_k>=0)
{
for(hcount=0;hcount<sub_k+1;hcount++)
{
dummy = decode_float(grib_decode_unsigned_long(hres,&hpos,32))*d;
dummy = decode_float(grib_decode_unsigned_long(hres,&hpos,32))*d;
lup++;
}
sub_k--;
}
pscals=scals+lup;
for(lcount=hcount; lcount < maxv ; lcount++)
{
val[i++] = (double) ((grib_decode_unsigned_long(lres, &lpos,
bits_per_value)*s)+reference_value);
val[i++] = (double) ((grib_decode_unsigned_long(lres, &lpos,
bits_per_value)*s)+reference_value);
lup++;
}
maxv--;
hcount=0;
mmax++;
}
Assert(*len >= i);
*len = n_vals;
if(d != 1) {
for(i=0;i<*len;i++)
val[i++] *= d;
}
grib_context_free(a->parent->h->context,scals);
return ret;
}
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